HTMS Prachuap Khiri Khan (Thai: เรือหลวงประจวบคีรีขันธ์) is the second Krabi Class offshore patrol vessel (OPV) of the Royal Thai Navy.

[4] She is a modified River-class offshore patrol vessel, and was built by Mahidol Adulyadej Naval Dockyard, with design and technology transfer support from BAE Systems Surface Ships.

[5] The ship was constructed at the Royal Thai Navy Mahidol Dockyard in Sattahip.

[6] The ship was launched in the presence of HRH Princess Maha Chakri Sirindhorn, second daughter of King Bhumibol Adulyadej on 2 August 2019.

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